How to vertically align text inside a flexbox?

Question

I would like to use flexbox to vertically align some content inside an

but not having great success.

I\'ve checked online and many of the tut

Answer 1

It's depend on your li height just call one more thing line height

* {
  padding: 0;
  margin: 0;
}

html,
body {
  height: 100%;
}

ul {
  height: 100%;
}

li {
  display: flex;
  justify-content: center;
  align-self: center;
  background: silver;
  width: 100%;
  height:50px;line-height:50px;
}

  
This is the text